Product classification
HS code for Large diameter steel pipe: 7305.19
Iron or steel (excluding cast iron), line pipe of a kind used for oil or gas pipelines (not seamless), (not longitudinally welded), having circular cross-sections, external diameter exceeds 406.4mm.
Classification of large diameter steel pipe under HS 7305.19
The classification of large diameter steel pipes under HS code 7305.19 is determined by several specific technical parameters defined in the Harmonized System's Chapter 73. According to the General Rules of Interpretation (GRI), specifically GRI 1 and 6, the classification is dictated by the terms of the headings and subheadings. For this code, the material must be iron or non-alloy steel, or alloy steel other than cast iron. Secondly, the external diameter is a critical threshold; it must exceed 406.4 mm (16 inches). Pipes with a smaller diameter are typically classified under heading 7306. Thirdly, the application is specific to line pipe used for oil or gas pipelines. Finally, the welding method distinguishes this code from others in the 7305 group. While 7305.11 covers longitudinally submerged arc welded pipes and 7305.12 covers other longitudinally welded pipes, 7305.19 is reserved for pipes that are not longitudinally welded. This most commonly refers to spirally welded (helical) pipes. The manufacturing process involves forming a steel strip into a hollow cylinder by winding it in a spiral and welding the edges together. This method allows for the production of very large diameters from relatively narrow steel strips. The structural integrity of these pipes is governed by international standards such as API 5L, which specifies the requirements for the gas and oil industry.
- Covers
- Spiral submerged arc welded (SSAW) steel pipes for gas transmission
- Helically welded iron pipes for oil pipelines exceeding 406.4mm diameter
- Non-longitudinally welded line pipes for offshore oil rigs
- Large diameter steel casing pipes with spiral seams
- Also under 7305.19
- ArcelorMittal HSAW pipe
- JFE Steel SSAW pipe
- Baosteel SSAW pipe
- EVRAZ North America HSAW pipe
Codes often confused with 7305.19
Common mistake. This code is frequently confused with 7305.11 and 7305.12. The primary difference lies in the weld seam orientation. 7305.11 is for longitudinal submerged arc welding, while 7305.12 is for other longitudinal welds (like ERW). If the pipe is seamless, it must be classified under 7304. Additionally, if the diameter is 406.4mm or less, heading 7306 applies regardless of the welding method. Misclassifying the welding type can lead to incorrect duty applications, especially in jurisdictions with trade remedies against specific welding processes.
Top exporters and importers of HS 730519 (the code used for large diameter steel pipe), 2025
In 2025, the largest exporter of HS 730519 (the code used for large diameter steel pipe) in UN Comtrade data was China, with 33% of world exports; the largest importer in UN Comtrade data was Italy, with 61% of world imports. Countries that did not report 2025 data are estimated from partner records, which can understate them.
Figures cover everything classified under HS 730519, not only large diameter steel pipe.
Top exporters 2025 · share of world exports
- 1 China $94M 33% of world exports
- 2 Germany $82M 29% of world exports
- 3 India $43M 15% of world exports
World total: $286M Reported figures on UN Comtrade ↗
Top importers 2025 · share of world imports
- 1 Italy $279M 61% of world imports
- 2 Angola $30M 6.5% of world imports
- 3 Romania $21M 4.6% of world imports
World total: $457M Reported figures on UN Comtrade ↗
How these figures are built
109 countries reported 2025 trade to UN Comtrade in HS 2022, and their own totals are used. Countries that did not report are estimated from what other countries recorded trading with them. Those estimates miss trade with other non-reporting countries, so they can be low, and a non-reporting country can rank higher than shown or be missing from the list. World totals add both and leave out trade between two non-reporting countries. Figures are in current US dollars; reported imports are mostly valued CIF and exports FOB, and exports include re-exports. The UN Comtrade links show the underlying records; they can also list a few reporters left out here (regional groups and older HS editions).
Source: UN Comtrade (United Nations Statistics Division), 2025 annual data.
Brazil NCM code for large diameter steel pipe
Brazil classifies large diameter steel pipe under NCM 7305.19.00: HS 7305.19 with 00 added.
Source: Siscomex NCM table, updated Oct 2026. The Portuguese text on each NCM page is the official one.
EU Regulatory Requirements
This product falls under the Carbon Border Adjustment Mechanism (CBAM). Importers to the EU must declare embedded carbon emissions and purchase CBAM certificates.
Questions about large diameter steel pipe
What is the HS code for Large diameter steel pipe?
The HS code for Large diameter steel pipe is 730519 (Iron or steel (excluding cast iron); line pipe of a kind used for oil or gas pipelines (not seamless), (not longitudinally welded), having circular cross-sections, external diameter exceeds 406.4mm). The HS code for large diameter steel pipe (exceeding 406.4mm) used for oil or gas pipelines that is not longitudinally welded is 7305.19.
How do I classify Large diameter steel pipe for customs?
Large diameter steel pipe is classified under HS code 730519 — Iron or steel (excluding cast iron); line pipe of a kind used for oil or gas pipelines (not seamless), (not longitudinally welded), having circular cross-sections, external diameter exceeds 406.4mm. This is a 6-digit subheading level code.
Does this code include stainless steel pipes?
Yes, provided they meet the diameter and application criteria and are not longitudinally welded, as 7305 covers both iron and steel (including alloy and stainless).
Which countries are the top exporters of large diameter steel pipe (HS 730519)?
In 2025, the top exporters of HS 730519 (the code used for large diameter steel pipe) in UN Comtrade data were China ($94M, 33% of world exports), Germany ($82M) and India ($43M). World exports came to about $286M, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.
Which countries are the top importers of large diameter steel pipe (HS 730519)?
In 2025, the top importers of HS 730519 (the code used for large diameter steel pipe) in UN Comtrade data were Italy ($279M, 61% of world imports), Angola ($30M) and Romania ($21M). World imports came to about $457M, adding countries' reported figures and partner-based estimates for those that did not report (UN Comtrade data). Countries that did not report 2025 data are estimated from partner records, which can understate them.
Is the HS code for Large diameter steel pipe the same in all countries?
The base HS code 730519 for Large diameter steel pipe is internationally standardized for the first 6 digits across 200+ countries. Individual countries may add additional digits for national tariff lines and specific classifications.
What is the NCM code for large diameter steel pipe in Brazil?
In Brazil, large diameter steel pipe (HS 730519) is classified under NCM 7305.19.00.